Sewing machine shuttle



July 7, 1931. F. ASHWORTH 7 1,312,352

SEWING MACHINE SHUTTLE Original Filed Sept. 24, 1929 mnivr TM Patented July 7, 1931 cation. I

UNITED STATES FRED ASHWORTH, OIE BEVERLY, MASSACHUSETTS, ASSIGNOR TO UNITED SHOE MA- CHINERY CORPORATION, OF PATERSON, NEW JERSEY, A CORPORATION OF NEW JERSEY SEWING MACHINE SHUTTLE Original application filed 1930. Serial The present invention relates to sewing machine shuttles, and has for its object the provision of a discoidal shuttle and thread holder case having a simple and improved construction and arrangement of its various parts. H g

The present invention is intended primarily as an improvement on the shuttle and thread holder case disclosed in applicants prior application Serial No. 338,7 56, filed February 9, 1929, and is herein illustrated as embodied in a shuttle casing and thread holder similar in many respects to those disclosed in the application above referred to. The shuttle casing and thread'holder of the present invention, however, are arranged to allow the threadto be drawn from the outside ofthe thread mass or thread cop instead of from the inside, and embody certain novel features of construction particularly de signed for use in connection with a thread holder in which the thread is drawn from the outside, of the thread mass. Except as defined in the claims, however, the several features of the invention are not limited to use in a construction in which the thread is led from the outside instead of from the inside of the cop. V

- The several features of the present invention together with the advantages to be obtained thereby willbe readily understood by those skilled the-art from the following description taken in connection with the ac-. companying drawings in which Fig. 1 is a detail front view, of the improved shuttle and thread holder; Fig; 2 is a detail sectional view of the shuttle and thread holder, taken on the line 2r2 of Fig. 1; Fig. 3 is a detail sectional view of the thread holder removed from the shuttle and with the locking arm in raised position to permit threading of the thread holder. I v

- The present application is a division of applicants pending application. Serial No. 394,7 70, filed September 24, 1929, theshuttle' and thread holder being identical in cone struction with those disclosed in said appli- "As illustrated in he drawings the'discoidal shuttle casing is indicated at 4. The rear end September 24, 1929, Serial No. 394,770. Divided and this application filed. May 1,

of this casing is closed and the forward end is open to receive the thread holder. The thread holder indicated at 6 consists of a cylindrical thread case, the rear end of which 1s open to permit the insertion of a cop of thread while the holder is removed from the shuttle, and the front end of which, when the thread case is in position in the shuttle, forms a closure for the open end of the shuttle casing, the construction as so far described being substantially the same as that disclosed in applicantsprior application. From the closed end of the thread case 6 a stud 8 extends inwardly to form a central support for the thread mass or cop and within this stud a spring pressed plunger 10 is mounted. This plunger, however, instead of being pressed inwardly as in applicants prior construction, is pressed outwardly and its outward movement is limited by a washer 12 seated in under-cut grooves formed in the outer end of the thread case and forming a guideway for the locking slide hereinafter described. When the thread holder casing, properly threaded, is in position in the shuttle casing, as indicated in Figs. 1 and 2, the thread leads from the outside of the thread mass through an opening in the side wall of the thread holder case and then radially inward over the outer end of the thread holder case to a central opening 14 formed in an overlying arm 16. The opening 14 is directly over the outer end of the plunger 10, and the thread in its passage from the thread mass to the opening passes between the inner surface of the arm 16, and the outer end of the plunger. The shuttle thread is thus subjected to sufi icient pressure to produce the required tension on the thread.

Means forlocking the thread case securely'in position in the shuttle casing, while permitting its ready removal, comprise a flange 18 projecting radially from the inner end of the thread case and adapted to engage aslot formed in the wall of the shuttle cas ing, andthe arm 16, the free end of which is arranged to engage a groove 20 formed in the shuttle casing diametrically opposite the slot which receives the flange 18. To permit the arm 16 to be moved into and out of en- 5 of the thread case 6'. The thread can be readily removed from the shuttle casing by moving the slide 22 towards the right, as viewed in Figs. "1 and 2, untilithe end oi thearm 16 movesout the groove 20 and by then tilting the thread case slightly so as to disengage the flange 18 from its cooperating slot. The thread case can be completely threaded before it is replaced in the shuttle casing. Inv order tofacilitate 'the'threading operation, the arm 16 is pi'votally mounted upon thesl ide 22 at 26-; This permits thearm 16 to be swung outwardly into the position indieatedin in wh-ieh'position the: end of the shuttle thread can readily* be passed outwardly through the opening Then the locking slide '22 and asviewed in down against the plunger 10 by the engage-- ment of the outer end of'thearm ldwith the shuttle casing. rt assist in this action, and also to guide the amt 16 accurately into engagement with the groove 20, projecting lugs-28 are formed at the sides-of the arm '1'6' near its outer end and are arranged? to err gage the slots 24 which are extended com'e pletely across the o-uter end of thethread case for this purpose. Openings 39- formed in the outer end: o-f'th'e thread case pennit" an outward movement of thearm to the position indicated in Fig. after the-arm together withthe "slide 22 has been moved diametrically of the thread case a suifi'cient distance to; disengage the arm from-the groove 2'0; The withdrawing movement of theslide 22 is limited by stoppirr 32 pro jetting fromtheouter end of 'the threadlcases Theslide 22 with; the 'arnr16 is held} in leek i'ng position by the engagement of the outer end of the plungerIO Witlrr a correspondingly shaped recessformed the? under side: eithearm"16. The plungeris disengaged from rec'esswhen it is desired to removethetlireau l holder-case from the shuttle'icasiirg Ely; insert ing asuitably shaped tool through the open ing 14 and forcing the: plunger" inwardly Theinvention having-heendescribed,

is claimed is; i

1.5 A sewing machine shuttle comprisinga discoidal" shuttle casing-- having an open end, a removable thread holderforming" a cl osure, for the open end or the shuttle casing pro vided' with a'stud projecting inwardiy into= the shuttle: casing andiforming a central 'sup port for the: shuttlethre'ad mass; aithread engaging" plunger mounted in saidstud; means" for removahlylocking the thread holder to theshuttle casing, comprising" a;

arranged tomove in of engagement with 1 arm 1'6 aremoved to theleft,

Figs. 1 and 2, to lock the thread Case-in the shuttle casing, the arm l6- isheld dis coidal shuttle easing havingan open end and a removable thread holder tamin a closure forthe open end of the shuttle oasing, provided with a stud projecting inwardly into the shuttle i-eas-i-ng and forming a een tralv support for the shuttle thread mass, means for removably locking the thread holder to the shuttle easing, comprising a loeki-rrgislide' mounted in the gend o ii the thread holder ca-singto move "diametrically intef engagement with the shuttle casing, a plunger mountedin said stud arranged toengage a hole in the sliderwhen the slidein l c l'ring position, and a spring arranged to press said plunger outwardly into engagement with said hole and towards a surfaceonthe slide between which the. plunger thethread' passes onits way from the shuttle tothework. 1

3 A sewingmachineshuttle-comprising a disc'oidal shuttlecasing having'an open-end and a removable thread holder forming a clesare tor the openendof the shuttle easing provided. with a stud projecting inwardly intothe shuttle casing-andforming a centrali support for the shuttlethread mass meansr for removabl y locking the thread holder the shuttle easing, comprising a locking slide mounted the-end ot the thread holder caszi-ng tomovediametrically into I engagement with the shuttle casing, anarm pivotally mounted on said'slide provided with. a hole. through which the thread passes on its way from the slruttle to the work, a'threa'd enigaging plunger mounted in said-stud, a spring arranged to press said plunger outwardly into' eng -gementwith thethreadi itspassage to thehole in said arm.v I I la-1h sewing machine shuttle comprising. a discoid a l shuttle casing having an openend} a removable thread holderforming a closure,

into engagement withithe: thread in its'pasrvided with a stud projecting inwardly into the shuttle casing and forming a central support for the shuttle thread mass, a thread engaging plunger mounted in said stud, means for removably locking the thread holder to the shuttle casing, and a spring arranged to press said plunger outwardly towards a surface at the outer end of the thread holder casing between which surface and the plunger the thread passes on its way from the shuttle to the work.

6. A sewing machine shuttle comprising a discoidal shuttle casing having an open end and a removable thread holder forming a closure for the open end of the shuttle casing provided with a stud projecting inwardly into the shuttle casing and forming a central support for the shuttle thread mass, means for removably locking the thread holder to the shuttle casing, comprising a locking slide mounted in the end of the thread holder casing to move diametrically into engagement with the shuttle casing, and anarm pivotally mounted on said slide provided with a hole through which the thread passes on its way from the shuttle to the work.

In testimony whereof I have signed my name to this specification.

FRED ASHWORTH. 

